Piston-rod packing



nm Nm IK TO m AD MO P m d 0 M O W No. 458,493. Patented June 2,1891.

INVENTOH )YZ'QBAUZ Z7- Marlin. BY

d/waw/x Q W/TNESSES.

wwwd (CM ATTORNEYS TTn STATES PATENT OFFICE.

STEPHEN D. MARTIN, OF JERSEY CITY, NEW JERSEY.

PISTON-ROD PACKING.

SPECIFICATION forming part of Letters Patent No. 453,493, dated June 2,1891.

Application filed September Z5, 1890. Serial No. 366.1ZO%. (N0 model.)

To aZZ whom it may concern:

Be it known that I, STEPHEN D. MARTIN, a citizen of the United States,residing at Jersey City, in the county of Hudson and State of NewJersey, have invented new and useful Improvements in Piston-RodPackings, of which the following is a specification.

This invention relates to a packing composed of a compressible outsidesplit ring with a beveled inside edge, a compressible inside split ring,with a /\-shaped outside edge, and a metallic ring composed of a flatplate and a V-shaped annular ridge formed on or secured to the fiatplate, as pointed out in the following specification and claim,andillustrated in the accompanying drawings, in which- Figure 1 representsa section of a stuffingbox provided with my packing. Fig. 2 is adetached section of the metallic ring. Fig. 3 is an inverted plan of thesame. Fig. 4 is a detached section of the inside ring. Fig. 5 is a planof the same. Fig. (5 is a detached section of the outside ring. Fig. 7is a plan of the same.

The cylinder-head A, the stuffing-box B, the gland G, and the piston-rodD are of the usual well-known construction. E is the outside ring, whichis made of hemp and rubber or of any other suitable compressible andelastic material. The said ring is split by providing it with an obliquecut 0, Fig. 7, and its inner edge e is oblique or beveled, leaving aflat portion c" on its upper face, as shown in Fig. 6.

F is the inside ring, which is also made of a compressible and elasticmaterial and provided with an oblique out f. (See Fig. 5.) The peripheryof this ring is A-shaped, as shown at fin Fig. 4.. \Vhen the ring F isplaced into the ring E, the lower portion of its A-shaped edge bearsupon the beveled inner edge e of the outside ring E, leaving a V-shapedannular cavity f c, Fig. 1.

G is a metallic ring, which is made in two halves, Fig. 3, and composedof a flat plate or flange g. from the inner face of which projects aV-shaped ridge g, which fits the V- shaped annular cavity 6 f, formed bythe compressible rings E F. If pressure is applied to the packing, theridge g forces the inside ring F downward and inward, and by thecombined action of the ridge g and of the inside ring F the outside ringE isforced downward and outward, so that a tight joint is formed on theinside of the packing, as well as on its outside.

'What I claim as new, and desire to secure byLetters Patent, is-

The combination, in a packing for pistonrods and the like, of the innercompressible and elastic split ring F, resting against the rod andhaving a V-shaped periphery f, the outer compressible and elastic splitring E, resting against the stufiing-box and having the top surface 6and inner beveled surface 6, against which bears the lower side of theV-shaped periphery of the inner ring, and the divided metallic ring G,comprising the plate 9, resting on the upper sides of the inner andouterrings and having the pendent V-shaped ridge g, bearing against thebeveled inner surface of the outer ring and the upper surface of theV-shaped periphery of the inner ring, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

STEPHEN I). MARTIN".

Vitnesses:

J. VAN SANTVOORD, E. F. KASTENHUBER.

